It is a scene from several teenage comedies. I don't remember their names and it is hard to google a movie scene, but it is always the same. Two girlfriends are sitting together and the quintessential nerd is walking over to them to either ask for a dance or a prom date. With a look of horror on her face, one of the girls exclaims, "He is coming over here! Don't look at him!" and both girls turn away and for extra comedic effect, use their hands to hide their heads. I just reversed the gender, for comedic effect.